Joint system for concrete slabs



FIG. 1 is a top front perspective view of the joint systems for concrete slabs showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a top front perspective view of the joint system in use.

The broken lines are intended to show the joint system in an environment and form no part of the claimed design. 

CLAIM The ornamental design for a joint systems for concrete slabs, as shown and described. 